Heat sealing apparatus



FIG. 1 is a front elevational view of a heat sealing apparatus showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a front and left perspective view of a heat sealing apparatus, in an alternate position.

The broken lines in the FIGS. 1, 2, 3, 5 and 7 show portions of the heat sealing apparatus that form no part of the claimed design. 

CLAIM The ornamental design for a heat sealing apparatus, as shown and described. 